Variable-power hand air-pump



C. L. HUNTLEY.

VARIABLE POWER HAND AIR PUMP.

APPLICATION FILED JULY 16, 1919.

Patented C. L. HUNTLEY.

VARIABLE POWER HAND AIR PUMP. APPLICATION FILED JUL I6, 1919.

1 ,390,559. PatentedSept. 13, 1921..

2 SHE TS-SHEET 2. f m

UNITED STATS CHARLES L'. HUNTLEY, or MILWAUKEE, WISCONSIN, ASSIGNOR or O E- A JESSIE'A'ALLEN, or on'nson CITY, oREeom'oNn-ro RrI-rmo EDWARD NIC OLSON AND ONE-FOURTH ro'a'ossrrr nriroHoLsoN, Born-or" ron'rLANnp -w 1 GUN- i I To all whom it may concern: g

Be it known that I, CHARnns HUNTLEY, a citizen of the United States, residing at Milwaukee, -in the county of'Clackamas and State of Oregon, have invented a new and useful Improvement inv Variable-Power Hand Air-Pumps, of which the following is a specification.)

The object of my invention an air-pump, which is adjustable to the power available, or required, for its operation, and is'especially adapted for inflating pneumatic tires. I

I attain'my object by providing a pump comprising two pumping elements, one of larger capacity than the other, both, discharging into a common compression chamber, and either of which elements maybe coupled singly to the operating means, or both may be coupled to latter. ,Hencemy improved air-pump gives three differentpowers, viz:-Vthe power of the two pump- 1 ing elements operating together, which is the greatest power; the power of the larger pumping elements which is the intermediate power, and finally the power of the smaller pumping elements, which is the smallest power. Hence the two pumping elements may be operated together in the first instance, to effect a rapid, partial filling of the deflated tire-tube, and theintermediate and smallest pumps may then be used indi vidually, as convenient, for further and complete inflation of the tire to'the desired degree. 1

The same features also adapts my airpump for equally efficient use, though at 7 different speeds, by a strong manor weaker person. 7

Another object of my invention is: to provide a-hand air-pump which is'of simple onstruction, eflicient and will keep in good condition. y

banal? T 'The details of my invention are hereinafter described andillustrated in the accompanying drawings'iri which:

provedair-pumpf Fig, 2 is a central longitudinal section on broken line 2-72 of Fig. 1', thus of; the larger and smaller barrels and of the related working parts housed in the "operating Figure 1 is a perspective view of my im VARIABLE-POWER HAND. ra-retrial, 5

Specification of-Letters Patent. Patented Application filed July is, 1519. s ial iiiojs11aefilf is to provide P ATENTQQFFI cs5.

F'g. 5 is a, perspective of the me cha nism housed f o r e handlepandibf the" umps are individually pm, tlvely coupled to said handle; 5 Figs. 67-8, are diagramm atic" illustrating the operation o'f' 'saidf fpuinp coupling mechanism J housed ,in the s am ing handle; 7 y ,v

Fig, 9 is a plan, section on the'broken line 9l9"0 f Fig. 2;}

)10 is a longitudinal central, section of the cylinder constituting'the' air ,purifying'chamber except thatthe section through the base of this chamber; is taken on, the

contained in said air purifying {chamber and f? ully described. j. tiis ajcastm'g 'orbasein which' are set the lates pump barrels 6,6", the former being' of u much larger cross section, their the flatter.

On fthe'upperendsof said pump barrels is ailixedfa reinforcing casting b, and-thereon 1s removably fastened a guide plate (Z; Tc, 0"

are the pistons-Tecipro'cated in" the *pump 7 barrels b, bf.

Said pistons 0;0" are re'sp'ec per ends ofsaid rods are provided,respectively with heads e; 6. said heads'slide' in guide tubes f, f",rigidly fastened"in'; the sleeve 9," g of the plate h." The lower ends of the guide tubes are provided with guide flanges f F. The heads f, f of'thepistonrods e areprovided with peripheral grooves" i, for receiving locking-barsj,

at in Fig The locking-barsj, y" are normally held against the closed ends; of the guide-lugs 1, '1 byi'coil-springs' m;

which are pivoted on the plate It as shown onof said. V

i the locking-bar j and the head 7 of the piston rod 6.

The cam 72 is formed with a stub-shaft 0 provided With a finger piece 0'. The locking-bars 7', j, and their operating mechanism are housed in the hollow p of the'operating handle g as shown inFig. 2 into which housing the extremities of the head f, f of the piston-rods 6,6 project.

As apparent the pistons c. 0" may be I coupled singly or both together to the handle bar q according to the setting of the finger piece v0 on the dial-plate 1, shown in Fig. 1, thereby arranging the cam 71. in either one of its three positions shown in said Figs. 6, 7 and8. .Thus,-when the cam 92 is arranged as shown in Fig 6, both piston-rods d, cl are connected to the plate h of the handle-bar q,

and my pump is adjusted to give its largest capacity; when the cam n is arranged as V I shown in F 7 the piston-rod d is disengaged from the handle-bar, and therefore the piston 0, of the smaller pump is operated only, while the head of the piston-rod (Z merely-slides in the guide tube 7; and when 3 the cam n isarranged as shown in Fig. 8,

7 a and covered by the base thepiston-rod (Z alone iscoupled to the handle-bar g, and the piston rod d is disengaged therefrom, and merely slidesinj the guide tube 7.

r The lower ends of the pumping elements are connected by ducts s, s as shown in Fig. 9 with an air purifying chamber 25, having vertical ducts t. In the latter figure the location of the pumping elements" and the compression chamber is indicated by brokenline:circles b earing the reference letters 6 b, t, of-said parts. 7

The tubular cylinderconstituting the body of the air purifying chamber t, has its lower end. set in a cap u, and its upper end in a cap 1). It is mounted on the base a,-byscrews w, Each of the vertical inlet ducts t is controlled jby a ball-valve 00 contained in the small chamber provided therefor in the base or cap u having perforations w. I V r In the lower part of the air purifying chamber t, are placed a series of diaphragms 2 having a'central hole-3, made with peripheral fiange segments4, and diaphragms 5, made with peripheral flange segments 6, with parts of the periphery out away so as to provide spaces 7. The diaphragms 2 and 5 alternate with each other as shown in Fig. 10-; their function is to cause the air forced into the air purifying chamber to take a circuitous,,pathrinpassing up through the air purifying chamber, as indicated by the arrows in F ig. 10, and thus inducethe deposit on the diaphragms, as

much as possible, of the oil carried by the 7 air pumped in the air purifying chamber.

"Above the diaphragm h, is filled waste 11.

In the upper end of the air purifying chamher is a perforated diaphragm12 fastened to the cap '0 by'screws13. The function of V the waste filling. is to absorb all particles of foreign nature which are carried into the air purifying chamber from the pumps, thus permitting the lubrication of the latter with out danger of the oil being injected into the air tube of the tire inflated by my pump."

The lower end of the tube 9 of the diaphragm 8 has a downward slope,so that drops'of oil from the waste 11 will rundown on one side of said tube and be deposited on the upper diaphragm 5. The waste is to be removed as often as it becomes saturatedand replaced by other waste. I have purposely so designed my pump that it may be amply lubricated. The bottom of the barrels b, 6 should be with oil. 7

If oil is carried over into the air purifying chamber and collects in the bottom end thereof, it may be poured out by removing the tapsscrew 26, hearing on a gaske t'27,

The diaphragms 2, 5 and 8 are made to kept filled have a snug fit in the cylinder t, so as to stay inplace, at the sametime being iremov able for cleaning the air purifying chamber. V I On the cap 4) is secured, by screws a plate. let provided with a nipple 15 on which is fastened a rubber tube 16 for conveying the air to the valve of the tire.

The upper end of the air purifying chamher 5 is tapped by a tube 17 or hollow wire ing the up stroke of the latter, and the cup i being then flared out bythe pressure of the airduring the down stroke of the piston, and thus confining the air as usual in the type of construction illustrated. .The' pis piston-rod by a screw 26.

ton-head 0 is secured to the flange 20 of the spaced apart and holding between them a gasket 24 having a loose fit in the pump barrel (see Figs. 3 and 4:).

The casting or base a is made with laterally projecting feet 25, so that the operator may bear down thereon with his foot for holding the pump while operating it.

In using my pump, the operator can turn the finger piece 0 to any position desired so as to obtain pumping capacity in either the small or large pumping elements individually or together. In the first case the piston 0 becomes inactive and air from the small pumping element barrel 1) is forced through the duct 8 into the air purifying chamber. In the second case the piston 0 becomes inactive and air from the large pumping element barrel 1) is forced through the duct 8' into the air purifying chamber and in the third case, both pistons are active and both pumping elements will work to their full capacity.

I claim:

1. In a pump comprising a plurality of barrels of larger and smaller cross-sections respectively, a piston in each barrel, a single operating element, and means for connecting both or either of said pistons to said operating elements.

2. A pump comprising a plurality of barrels of larger and smaller cross-sections, respectively, a piston in each barrel and a rod on each piston, an operating handle provided with tubular guides reciprocating in said barrels, said piston rods reciprocating in said tubular guides and being of such length as to project beyond the latter, and means carried by the handle bar for connecting therewith both, or either of the piston-rods.

3. A pump comprising a plurality of barrels of larger and smaller cross-sections, respectively, a piston in each barrel and a rod on each piston, an operating handle provided with tubular guides reciprocating insaid barrels, guide flanges on the free ends of said tubular guides, said piston rods reciprocating in said tubular guides, and being of such length as to project beyond the latter, and means carried by the handlebar for connecting therewith both, or either of the piston-rods.

4:. A pump comprising a plurality of barrels of larger and smaller cross-sections, re-

I spectively,. a piston in each barrel and a rod on each piston, an operating handle provided with tubular guides reciprocating in said barrels, said piston rods reciprocating in said tubular guides, and being of such length as to project beyond the latter, and into a hollow therefor provided in the operating-handle, said projecting ends of the piston rods being provided with peripheral grooves, spring-controlled locking bars adapted normally to engage with the projecting ends of said piston-rods, and other means carried by the handle-bar operable to disengage'either of'said piston ends from said locking-bars.

5. A pump comprising a plurality of barrels of larger and smaller cross-sections, respectively, a piston in each barrel and a rod on each piston, an operating handle provided with tubular guides reciprocating in said barrels, said piston rods reciprocating in said tubular guides, and being of such length as to project beyond the latter and into a hollow therefor provided in the o'perating-handle, said projecting ends of in parallelism on said plate, springs draw- 7 ing said locking bars toward said grooved ends of the piston rods, and a cam, located between said locking bars, having a fingerpiece projecting exterior of the handle bar, whereby said cam may be arranged to throw either of said locking bars into disengaged position.

6. A pump comprising a plurality of bar-' rels of larger and smaller cross-sections, respectively, a piston in each barrel and a rod on each piston, an operating handle provided with tubular guides reciprocating in said barrels, guide flanges on the freeends of said tubular guides. said piston rods reciprocating in said tubular guides, and being of such length as to project beyond the 'into disengaged position.

CHAS. L. HUNTLEY.

latter and into a hollow therefor provided 

